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Is there a maximum HTML length?

I have created a PHP/MySQL database driven glossary of IT terms. The database contains 323 entries from a-z. On the website only entries a-f are displayed in the browser (both IE5 and Mozilla). When I view the source code (which is a massive file) all 323 entries are present so many are being cut off.

It looks as if there is a maximum page length that a browser can cope with, or maybe a maximum size for a table? Can anyone confirm this is the case?

Yep you are right it looks like some of the users have entered HTML tags into the form without escaping them.

I am fairly new to MySQL and PHP the page shown is updated by entering data into a form online, which then updates the page. A number of different people have access to the form and are entering all sorts of things. In the past most of my problems have been caused by use of exclamation marks and apostrophes this time the user has typed in tags.

Is there any way of dissallowing html tags, apostrophes, quotation marks etc. In the form to prevent these sort of problems?